/*
 * Copyright (c) 2023 Yunshan Networks
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package segmenttree

import (
	"errors"
)

var (
	InvalidDimension           = errors.New("Invalid dimension")
	InsufficientIntervalLength = errors.New("Insufficient interval length")
)

type Endpoint = int64

type Interval interface {
	Lower() (Endpoint, bool)
	Upper() (Endpoint, bool)
}

type Value interface {
	Id() uint64 // unique number for identification
}

type Intervals = []Interval

type Entry struct {
	Intervals Intervals
	Value     Value
}

type Tree interface {
	Query(...Interval) []Value
}
